oSIST prEN IEC 62702-1-1:2022
(Main)Audio archive system - Part 1-1: DVD disk and data migration for long term audio data storage
Audio archive system - Part 1-1: DVD disk and data migration for long term audio data storage
IEC 62702-1-1:2022 is available as IEC 62702-1-1:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62702-1-1:2022 specifies a method of data-quality assurance for writable DVD disks (hereafter referred to as "disks") which are specified for long-term data storage, and a data migration method which can sustain the recorded data on disks for long-term audio data preservation. The writable disks include recordable disks such as DVD-R, and +R format, and rewritable disks such as DVD-RW, +RW format and DVD-RAM. IEC 62702-1-1:2022 cancels and replaces the first edition published in 2016. This edition constitutes a technical revision. In order to reflect the updates to ISO/IEC 29121:2021, this edition includes the following significant technical changes with respect to the previous edition:
a) ISO/IEC 16963 has been identified as the referee test method for the estimation of lifetime;
b) the ambient conditions for the measurement of maximum data error have been added;
c) the requirements for test drives have been changed considering the use condition of users;
d) the requirements for the estimated lifetime have been defined more clearly;
e) the requirements for the periodic performance test have been defined more clearly.
Audio Archivierungssystem – Teil 1-1: DVD-Disk und Datenmigration für die Langzeit-Audiodaten-Speicherung
Système d'archivage audio - Partie 1-1: Disque DVD et migration de données pour le stockage à long terme des données audio
IEC 62702-1-1:2022 est disponible sous forme de IEC 62702-1-1:2022 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 62702-1-1:2022 spécifie une méthode d'assurance de la qualité des données pour les disques DVD inscriptibles (ci-après dénommés "disques") qui sont spécifiés pour le stockage à long terme des données, ainsi qu'une méthode de migration des données capable de conserver les données enregistrées sur les disques de manière à assurer la conservation à long terme des données audio. Les disques inscriptibles incluent les disques enregistrables comme le DVD-R (Digital Versatile Disc-Recordable), le format +R, ainsi que les disques réenregistrables comme le DVD-RW (Digital Versatile Disc-Rewritable), le format +RW et le DVD-RAM (Digital Versatile Disc-Random Access Memory). L'IEC 62702-1-1:2022 annule et remplace la première édition parue en 2016. Cette édition constitue une révision technique. Afin de refléter les mises à jour apportées à l'ISO/IEC 29121:2021, cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) l'ISO/IEC 16963 a été identifiée comme méthode d'essai de référence pour l'estimation de la durée de vie;
b) des conditions ambiantes ont été ajoutées pour le mesurage de l'erreur de données maximale;
c) les exigences relatives aux unités d'essai ont été modifiées en fonction des conditions d'utilisation des utilisateurs;
d) les exigences relatives à la durée de vie estimée ont été définies de manière plus précise;
e) les exigences relatives à l'essai périodique de performances ont été définies de manière plus précise.
Sistem zvočnega arhiva - 1-1. del: DVD disk in migracija podatkov za dolgoročno shranjevanje zvočnih podatkov
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 62702-1-1:2022
01-januar-2022
Sistem zvočnega arhiva - 1-1. del: DVD disk in migracija podatkov za dolgoročno
shranjevanje zvočnih podatkov
Audio archive system - Part 1-1: DVD disk and data migration for long term audio data
storage
Système d'archivage audio - Partie 1-1: Disque DVD et migration de données pour le
stockage à long terme des données audio
Ta slovenski standard je istoveten z: prEN IEC 62702-1-1:2021
ICS:
33.160.30 Avdio sistemi Audio systems
35.220.30 Optične shranjevalne Optical storage devices
naprave
oSIST prEN IEC 62702-1-1:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 62702-1-1:2022
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oSIST prEN IEC 62702-1-1:2022
100/3670/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62702-1-1 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2021-11-19 2022-02-11
SUPERSEDES DOCUMENTS:
100/3604/CD, 100/3645/CC
IEC TA 6 : STORAGE MEDIA, STORAGE DATA STRUCTURES, STORAGE SYSTEMS AND EQUIPMENT
SECRETARIAT: SECRETARY:
Japan Mr Koji Tsukada
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
TITLE:
Audio archive system - Part 1-1: DVD disk and data migration for long term audio data storage
PROPOSED STABILITY DATE: 2027
NOTE FROM TC/SC OFFICERS:
Copyright © 2021 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
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1 CONTENTS
2 CONTENTS . 2
3 FOREWORD . 4
4 INTRODUCTION . 6
5 1 Scope . 7
6 2 Normative references . 7
7 3 Terms and definitions . 7
8 4 Disk and lifetime for long-term audio data storage . 9
9 4.1 Disk for long-term audio data storage . 9
10 4.2 Lifetime estimation . 9
11 4.3 B life for long-term audio data storage. 10
mig
12 4.4 Estimated-lifetime rank and display colour . 11
13 4.4.1 Estimated-lifetime rank and display colour identification . 11
14 4.4.2 Bmiglife and display colour indication on disks and packages . 11
15 5 Test condition, test methods and disks for audio data . 11
16 5.1 Ambient conditions of maximum data error measurement . 11
17 5.2 Test methods . 11
18 5.2.1 Playback test drive . 11
19 5.2.2 Test area and sample disk . 11
20 5.2.3 Recording test drive. 12
21 5.2.4 Test drive check . 12
22 6 Test result evaluation . 12
23 6.1 Initial performance test result evaluation . 12
24 6.2 Periodic performance test evaluation . 13
25 6.3 Reporting items . 14
26 6.3.1 Initial performance test result . 14
27 6.3.2 Periodic performance test result . 14
28 6.4 Management of reporting item. 14
29 6.5 Test and migration intervals . 14
30 7 Prevention of deterioration . 15
31 Annex A (informative) Guideline of usage and indication . 16
32 A.1 Usage of lifetime rank . 16
33 A.2 Lifetime rank indication and place . 16
34 A.2.1 Lifetime rank indication . 16
35 A.2.2 Indication example . 16
36 Annex B (informative) Recommendations on handling, storage and cleaning conditions
37 for DVD-R, DVD-RW, DVD-RAM, +R format, and +RW format disks . 17
38 B.1 Handling . 17
39 B.2 Storage . 17
40 B.3 Cleaning . 18
41 Annex C (informative) Guideline of disk history record . 19
42 Bibliography . 25
43
44 Figure 1 – Data migration flow for DVD-R, DVD-RW, DVD-RAM, +R format, and +RW
45 format disks . 14
46 Figure A.1 – Indication example . 16
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47
48 Table 1 – Category of initial recording performance . 12
49 Table 2 – Category of recording performance at periodic performance test . 13
50 Table B.1 – Recommended conditions for general storage . 17
51 Table B.2 – Recommended conditions for Controlled storage . 17
52 Table C.1 – Sectors of the disk history file . 20
53 Table C.2 – Byte content of sector 0 ~7 of the disk history file . 21
54 Table C.3 – Byte format of sector 8 to 15 and 9 to the following of the disk history file . 23
55
56
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57 INTERNATIONAL ELECTROTECHNICAL COMMISSION
58 ____________
59
60 AUDIO ARCHIVE SYSTEM –
61
62 Part 1-1: DVD disk and data migration for long-term audio data storage
63
64 FOREWORD
65 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
66 all national electrotechnical committees (IEC National Committees). The object of IEC is to p romote international
67 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
68 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
69 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
70 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
71 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
72 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
73 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
74 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
75 consensus on the relevant subjects since each technical committee has representation from all intere sted IEC
76 National Committees.
77 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
78 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
79 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
80 misinterpretation by any end user.
81 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
82 transparently to the maximum extent possible in their national and regional publications. Any divergence between
83 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
84 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
85 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
86 services carried out by independent certification bodies.
87 6) All users should ensure that they have the latest edition of this publication.
88 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
89 members of its technical committees and IEC National Committees for any personal injury, property damage or
90 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
91 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
92 Publications.
93 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
94 indispensable for the correct application of this publication.
95 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
96 rights. IEC shall not be held responsible for identifying any or all such patent rights.
97 IEC 62702-1-1 has been prepared by technical area 6: Storage media, storage data structures,
98 storage systems and equipment, of IEC technical committee 100: Audio, video and multimedia
99 systems and equipment. It is an International Standard.
100 This 2nd edition cancels and replaces the 1st edition published in 2016-05-12, Corrigendum 1:
101 2018-02-21. This edition constitutes a technical revision.
th
102 Reflect the update of the reference standard ISO/IEC 29121 4 edition that has been published,
103 this edition includes the following significant technical changes with respect to the previous
104 edition:
105 a) ISO/IEC 16963 has been identified as the referee test method for the lifetime estimation;
106 b) the ambient conditions for the measurement of maximum data error have been added;
107 c) the requirements for test drives have been changed considering the use condition of users;
108 d) the requirements for the estimated lifetime have been defined more clearly;
109 e) the requirements for the periodic performance test have been defined more clearly.
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IEC CDV 62702-1-1 Ed2 © IEC:2021 – 5 –
110 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
111
112 Full information on the voting for its approval can be found in the report on voting indicated in
113 the above table.
114 The language used for the development of this International Standard is English.
115 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
116 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
117 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
118 described in greater detail at www.iec.ch/standardsdev/publications.
119 The committee has decided that the contents of this document will remain unchanged until the
120 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
121 specific document. At this date, the document will be
122 • reconfirmed,
123 • withdrawn,
124 • replaced by a revised edition, or
125 • amended.
126
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its contents.
Users should therefore print this document using a colour printer.
127
128
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129 INTRODUCTION
130 Sound recordings such as music, speech, and storytelling are an important human heritage and
131 should be preserved for as long as possible. However, we were not able to record sounds in
132 order to preserve them in the past. The first recoding was achieved by Edison in 1877.
133 Although various technologies were invented later, most of them have limitations for audio
134 archives because storage life time is limited and the sound quality deteriorates when it is
135 transferred to the next generation storage device.
136 The progress of LSI technology made digital recording of recorded sound possible. The digital
137 recording is very suitable for audio archiving because the migration is performed by copying
138 digital data.
139 For this purpose, various recording materials exist, such as optical disks, magnetic disks,
140 magnetic tape and non-volatile memory such as a phase change memory.
141 This International Standard specifies physical and logical aspects for a standard of audio
142 archives of various storage types which are typically used for audio archives in markets.
143 The IEC 62702 series currently consists of:
144 Part 1 specifies the minimum requirements on physical aspects of optical disks for digital sound
145 recordings. Part 1-1 specifies DVD optical disks, and Part 1-2 specifies BD optical disks.
146 Part 2 specifies the minimum requirements for digitization of content, format of digitised content,
147 content information and media inspection.
148
149
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150 AUDIO ARCHIVE SYSTEM –
151
152 Part 1-1: DVD disk and data migration for long-term audio data storage
153
154
155
156 1 Scope
157 This part of IEC 62702 specifies a method of data-quality assurance for writable DVD disks
158 (hereinafter disks) which are specified for long-term data storage, and a data migration method
159 which can sustain the recorded data on disks for long-term audio data preservation. The
160 writable disks include recordable disks such as DVD-R, and +R format, and rewritable disks
161 such as DVD-RW, +RW format and DVD-RAM.
162 2 Normative references
163 The following documents are referred to in the text in such a way that some or all of their content
164 constitutes requirements of this document. For dated references, only the edition cited applies.
165 For undated references, the latest edition of the referenced document (including any
166 amendments) applies.
167 ISO/IEC 16963:2017, Information technology – Digitally recorded media for information
168 interchange and storage – Test method for the estimation of lifetime of optical media for long-
169 term data storage
170 ISO/IEC 29121:2021, Information technology – Digitally recorded media for information
171 interchange and storage – Data migration method for optical disks for long term data storage
172 3 Terms and definitions
173 For the purposes of this document, the following terms and definitions apply.
174 ISO and IEC maintain terminological databases for use in standardization at the following
175 addresses:
176 • IEC Electropedia: available at http://www.electropedia.org/
177 • ISO Online browsing platform: available at http://www.iso.org/obp
178 3.1
179 B life
mig
180 lifetime (3.10) for use of data migration (3.6) and identical to B life which is 0,000 001
0,000 1
181 quantile of the lifetime distribution (i.e. 0,000 1 % failure time) or 99,999 9 % survival lifetime
182 [SOURCE: ISO/IEC 29121:2021, 3.1]
183 3.2
184 B life
5
185 5 percentile of the lifetime (3.10) distribution (i.e. 5 % failure time) or 95 % survival lifetime
186 [SOURCE: ISO/IEC 16963:2017, 3.4]
187 3.3
188 (B life)
5 L
189 95 % lower confidence bound of B life (3.2)
5
190 [SOURCE: ISO/IEC 16963:2017, 3.5]
191 3.4
192 B life
50
193 50 percentile of the lifetime (3.10) distribution (i.e. 50 % failure time) or 50 % survival lifetime
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194 [SOURCE: ISO/IEC 16963:2017, 3.6]
195 3.5
196 controlled storage condition
197 well-controlled storage conditions with full-time air conditioning (25 °C and 50 % relative
198 humidity) in which the lifetime (3.10) of data stored on optical disks
199 [SOURCE: ISO/IEC 16963:2017, 3.7]
200 3.6
201 data migration
202 process to copy data from one storage device or medium to another
203 [SOURCE: ISO/IEC 29121:2021, 3.5]
204 3.7
205 error correction code
206 ECC
207 mathematical computation yielding check bytes used for the detection and correction of errors
208 in data
209 Note 1 to entry: For DVD-R, DVD-RW, DVD-RAM, +R format, and +RW format disks, the Reed-Solomon product code
210 defined in ISO/IEC 16448:2002 for DVD-ROM systems is applied.
211 [SOURCE: ISO/IEC 29121:2021, 3.6 modified — Note 1 to entry is modified.]
212 3.8
213 error rate
214 rate of errors or error count measured on the signal at the input of error-correction decoder,
215 which represents raw-error rate of data recorded on a disk
216 [SOURCE: ISO/IEC 29121:2021, 3.7]
217 3.9
218 initial performance test
219 first test of the error rate (3.8) of data recorded on a disk before storing
220 [SOURCE: ISO/IEC 29121:2021, 3.8]
221 3.10
222 lifetime
223 time that information is retrievable in a system (3.17)
224 [SOURCE: ISO/IEC 29121:2021, 3.9]
225 3.11
226 maximum byte-error-rate
227 BER
max
228 greatest level of byte error rate at any consecutive 32 error correction code (3.7) blocks in one
229 of relevant area of the disk as measured in the first pass of the decoder before correction
230 Note 1 to entry: BER is applied to DVD-RAM disks.
max
231 [SOURCE: ISO/IEC 29121:2021, 3.10]
232 3.12
233 maximum data error
234 greatest level of error rate (3.8) anywhere in one of the relevant areas on the disk
235 [SOURCE: ISO/IEC 16963:2017, 3.13, modified — Note 1 to entry has been deleted.]
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236 3.13
237 maximum parity inner sum 8
238 PI
sum 8,max
239 greatest level of parity (of the) inner code error count at any consecutive 8 error correction code
240 (3.7) blocks in one of the relevant areas of the disk as measured in the first pass of the decoder
241 before correction
242 Note 1 to entry: See ISO/IEC 16448, ISO/IEC 23912, ISO/IEC 17341, ISO/IEC 17342 and ISO/IEC 17344.
243 [SOURCE: ISO/IEC 29121:2021, 3.13 modified — Note 1 to entry is modified.]
244 3.14
245 periodic performance test
246 periodic test of the error rate (3.8) of data recorded on a disk during the storage
247 [SOURCE: ISO/IEC 29121:2021, 3.15]
248 3.15
249 retrievability
250 ability to recover physical information as recorded
251 [SOURCE: ISO/IEC 16963:2017, 3.14]
252 3.16
253 substrate
254 transparent layer of the disk, provided for mechanical support of the recording or recorded layer,
255 through which the optical beam accesses the recordable/recorded layer
256 [SOURCE: ISO/IEC 16448:2002, 4.18]
257 3.17
258 system
259 combination of hardware, software, storage medium and documentation used to record, retrieve
260 and reproduce information
261 [SOURCE: ISO/IEC 16963:2017, 3.20]
262 3.18
263 uncorrectable error
264 error in the read-out data that could not be corrected by the error correcting decoders
265 [SOURCE: ISO/IEC 29121:2021, 3.18]
266 3.19
267 X interval
mig
268 migration interval (year) which is determined by user
269 [SOURCE: ISO/IEC 29121:2021, 3.19 modified — Note 1 to entry has been deleted.]
270 4 Disk and lifetime for long-term audio data storage
271 4.1 Disk for long-term audio data storage
272 A disk with a specified lifetime should be used for long-term audio data storage. A disk with an
273 unspecified lifetime should not be used.
274 4.2 Lifetime estimation
275 For the purposes of this part, the lifetime of a disk shall be derived from the measurements
276 specified in ISO/IEC 16963. The Eyring method is used for lifetime estimation under controlled
277 storage-conditions (25 °C and 50 % relative humidity).
278 In ISO/IEC 16963, the estimated lifetime can be defined variously as B life, B life and the
50 5
279 95 % lower confidence bound of B life [equals (B life) ] and described as follows.
5
5 L
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̂ ̂ ̂ ̂
𝐵 = exp(ln𝐵 ) = exp(𝛽 + 𝛽 𝑥 + 𝛽 𝑥 )
50 life 50 0 1 10 2 20
̂ ̂ ̂
̂
𝐵 = exp(ln𝐵 ) = exp(𝛽 + 𝛽 𝑥 + 𝛽 𝑥 − 1,64𝜎̂)
5 life 5 0 1 10 2 20
280 where
B50 life is the variable for B50life;
B is the variable for B life;
5 life 5
are the temperature-dependent factor and the relative-humidity–dependent factor at the
x10 and x20
controlled storage conditions (25 °C/50 % relative humidity) respectively.
281 Also, the 95 % lower confidence bound of B5life becomes
̂ ̂ ̂
𝐵 = exp [(ln𝐵 ) ] = exp [ln𝐵 − 1,64√var(ln𝐵 )]
(5 life)L 5 5 5
L
282 where
B is the variable for (B life)
(5 life)L 5 L
283
ˆ ˆ ˆ
ˆ
284 and estimated variance of residual errors are obtained using regression analysis of
β,,β β σ
0 1 2
285 time-to-failure data.
286 4.3 B life for long-term audio data storage
mig
287 The estimated lifetime of B life means 5 % of the products reach failure. It is widely used in
5
288 other contexts. However, from the viewpoint of the reliability of long-term audio storage to retain
289 the integrity of the original data, it is not appropriate to use B life as the estimated lifetime when
5
290 determining a test interval and deciding on data migration.
291 In the case of audio data migration, it is necessary to have a sufficiently low failure probability.
292 The time at which one millionth of the products reach failure shall define the estimated lifetime
293 in this standard to determine test intervals and migration interval. B life is 0,000 001
0,000 1
294 quantile of the lifetime distribution (i.e. 0,000 1% failure time) and expressed as B life in this
mig
295 part. B life can be calculated using B life and B life as follows (see also ISO/IEC 29121:2021,
mig 50 5
296 Annex E)
̂ ̂
ln𝐵 − ln𝐵
50 5
̂ ̂ ̂
𝐵 = exp (ln𝐵 ) = exp(ln𝐵 − 4,75𝜎̂) = exp (ln𝐵 − 4,75 ) =
0,000 1 life 0,000 1 50 50
1,64
̂ ̂
exp(2,9 ln𝐵 − 1,9 ln𝐵 )
5 50
297 where
𝐵 is the variable for B life.
0,000 1
0,000 1 life
298 Thus
̂ ̂
𝐵 × 24 × 365 = 𝐵 = exp (2,9 ln𝐵 − 1,9 ln𝐵 )
mig life 0,000 1 life 5 50
299 where
𝐵
is the variable for Bmiglife in years.
mig life
300
301 In actual storage conditions, the temperature and relative humidity may deviate from the
302 controlled storage condition of 25 °C and 50 % relative humidity, which changes the estimated
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303 lifetime. In this case, the estimated lifetime should be adjusted according to the estimated
304 lifetime at the actual storage conditions as specified in ISO/IEC 29121:2021, Annex D.
305 4.4 Estimated-lifetime rank and display colour
306 4.4.1 Estimated-lifetime rank and display colour identification
307 For audio data migration, rank of B life and its identifying display colour are defined as follows.
mig
308 B life is over 30 years, the display colour is red.
mig
309 B life is over 60 years, the display colour is green.
mig
310 B life is over 100 years, the display colour is gold.
mig
311 Guideline for use of the ranks of B life and their display colours are shown in Annex A.
mig
312 4.4.2 B life and display colour indication on disks and packages
mig
313 The rank of B life, its display colour and the reference-controlled storage condition shall be
mig
314 indicated both on disk and package, excluding a two-sided disk. Indication examples for ranks
315 and their colours are shown in Annex A.
316 5 Test condition, test methods and disks for audio data
317 5.1 Ambient conditions of maximum data error measurement
318 The ambient condition is the surrounding condition in a room where a test drive is located. The
319 ambient conditions for the PI and BER measurement are as follows:
sum 8,max max
Temperature
15 C to 30 C
Relative humidity 20 % to 75%
320 5.2 Test methods
321 5.2.1 Playback test drive
322 For DVD-R disk, DVD-RW disk, +R format disk, and +RW format disk, the test drive shall have
323 capability to measure PI .
sum 8,max
324 For DVD-RAM disk, the test drive shall have capability to measure BER .
max
325 The test drive shall have the capability to evaluate the error rate level specified in the initial
326 performance test and the periodic performance test.
327 The playback speed of the test drive should be:
4 × CLV (constant linear velocity),
for DVD-R, DVD-RW, +R format, and +RW format disks
or 6 × CLV
for DVD-RAM disk 2 × CAV (constant angular velo-
city), 3 × CAV, or 5 × CAV
328 5.2.2 Test area and sample disk
329 The test area is the recorded area to be tested in a disk.
330 The whole recorded area of all disks shall be tested for the initial performance test.
331 The whole recorded area of all disks should be tested for the periodic performance t est.
332 Although the integrity of the data becomes lower, the user may reduce the test area and/or the
333 number of sample disks based on a certain sampling method, considering the value of
334 information. For the reduction of test area, see ISO/IEC 16963:2017, 7.5 for additional
335 information. The number of sample disks should be enough value, which can guarantee the
336 statistical effectiveness. If the sample disks have different attributes such as disk standards,
337 recording conditions or storage conditions, the disks should be divided into groups of disks
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338 considering the attributes so that the sampling may be applied on each group with the statistical
339 effectiveness.
340 In case of a DVD-RAM disk, the replaced data in the defect management area, instead of the
341 defect data in the user area, should be tested.
342 5.2.3 Recording test drive
343 There are two cases of the test drive. One is that the drive serves both as a
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